Updated POST /api/groups/ to successfully add group
Fixed CSRF in API issue
Moved PUT and DELETE to /api/groups/:id (TODO: Implement)
Changed SQL to use user_id instead of API key
It is now possible to add a new group! Will propagate logic to campaigns soon.
Created services for campaigns/groups
Changed modals to be binded to the data. Will improve on this soon!
Added trailing slash to api endpoints (I hope to be able to remove this later)